前言

以官网给出的例子牛的图片为例子，这里主要解释一下后台返回到前端的代码如何映射到SVG图的各个部分

学习链接：registerMap

例子链接：例子

SVG图片：

JS部分：

var echarts = require('echarts');

var ROOT_PATH =
  'https://fastly.jsdelivr.net/gh/apache/echarts-website@asf-site/examples';

var chartDom = document.getElementById('main');
var myChart = echarts.init(chartDom);
var option;

$.get(ROOT_PATH + '/data/asset/geo/Beef_cuts_France.svg', function (svg) {
  echarts.registerMap('Beef_cuts_France', { svg: svg });
  option = {
    tooltip: {},
    visualMap: {
      left: 'center',
      bottom: '10%',
      min: 5,
      max: 100,
      orient: 'horizontal',
      text: ['', 'Price'],
      realtime: true,
      calculable: true,
      inRange: {
        color: ['#dbac00', '#db6e00', '#cf0000']
      }
    },
    series: [
      {
        name: 'French Beef Cuts',
        type: 'map',
        map: 'Beef_cuts_France',
        roam: true,
        emphasis: {
          label: {
            show: false
          }
        },
        selectedMode: false,

## 后台返回的数据
        data: [
          { name: 'Queue', value: 15 },
          { name: 'Langue', value: 35 },
          { name: 'Plat de joue', value: 15 },
          { name: 'Gros bout de poitrine', value: 25 },
          { name: 'Jumeau à pot-au-feu', value: 45 },
          { name: 'Onglet', value: 85 },
          { name: 'Plat de tranche', value: 25 },
          { name: 'Araignée', value: 15 },
          { name: 'Gîte à la noix', value: 55 },
          { name: "Bavette d'aloyau", value: 25 },
          { name: 'Tende de tranche', value: 65 },
          { name: 'Rond de gîte', value: 45 },
          { name: 'Bavettede de flanchet', value: 85 },
          { name: 'Flanchet', value: 35 },
          { name: 'Hampe', value: 75 },
          { name: 'Plat de côtes', value: 65 },
          { name: 'Tendron Milieu de poitrine', value: 65 },
          { name: 'Macreuse à pot-au-feu', value: 85 },
          { name: 'Rumsteck', value: 75 },
          { name: 'Faux-filet', value: 65 },
          { name: 'Côtes Entrecôtes', value: 55 },
          { name: 'Basses côtes', value: 45 },
          { name: 'Collier', value: 85 },
          { name: 'Jumeau à biftek', value: 15 },
          { name: 'Paleron', value: 65 },
          { name: 'Macreuse à bifteck', value: 45 },
          { name: 'Gîte', value: 85 },
          { name: 'Aiguillette baronne', value: 65 },
          { name: 'Filet', value: 95 }
        ]
      }
    ]
  };
  myChart.setOption(option);
});

option && myChart.setOption(option);

这就带来一个问题，后台返回的数据是如何映射到SVG图的各个部分上的呢？

通过查看 SVG 的html代码：

其实后台传来的数据的 name，需要与SVG图片html代码相应部位的name 的内容相对应

data: [
          { name: 'Queue', value: 15 },
          { name: 'Langue', value: 35 },
          { name: 'Plat de joue', value: 15 }
]

## 对应 SVG 图

<path name="Queue"
   style="fill:#921319;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linecap:square;stroke-linejoin:bevel;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
   d="m 79.1875,42.625 -28.28125,0.71875 -16.25,7.0625 -19.09375,26.875 -5.65625,26.84375 -0.84375,105.25 10.03125,-0.28125 2.125,-108.5 3.34375,-7.9375 -0.15625,-0.0625 c 0.127935,-0.148353 0.252038,-0.334229 0.375,-0.5 l 4.625,-10.90625 c 1.160782,-3.331585 2.453475,-6.881357 4.25,-10.15625 l 1.6875,-4 1.21875,-0.3125 c 3.89521,-4.622798 9.81761,-8.067743 12.75,-9.5625 L 73.5,44.84375 l 3.5625,0 2.125,-2.21875 z"
   transform="matrix(0.6362812,0,0,0.6362812,7.6936433,-10.065285)"
   id="path3704"
   inkscape:connector-curvature="0" />

<path name="Langue"
   style="fill:#921319;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linecap:square;stroke-linejoin:bevel;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
   d="m 536.375,106.46875 c 5.2885,14.34201 10.52945,33.1769 13.78125,43.21875 -0.0655,0.0771 -0.13181,0.1476 -0.21875,0.21875 l 16.5625,0.9375 10.5,-8.5 11,-17 -13.5,-18 -38.125,-0.875 z"
   id="path3702"
   transform="matrix(0.6362812,0,0,0.6362812,7.6936433,-10.065285)"
   inkscape:connector-curvature="0" />

<path name="Plat de joue"
   style="fill:#921319;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linecap:square;stroke-linejoin:bevel;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
   d="m 479.875,78.9375 c 0.34134,7.189091 0.93966,14.327462 3.25,20.84375 7.5898,21.40693 18.02765,40.11508 34.125,55.21875 -5.6799,1.95428 -9.21826,3.15884 -11.875,4.09375 0.41224,0.77565 1.5132,2.80766 1.625,3.03125 0.81585,1.6317 7.32508,-4.6998 16.75,-8.25 6.91248,-2.6038 24.01189,-1.36903 26.40625,-4.1875 C 545.49285,135.28652 536.7499,102.74928 529.625,91.40625 520.34937,82.635259 489.68249,79.683068 479.875,78.9375 z"
   transform="matrix(0.6362812,0,0,0.6362812,7.6936433,-10.065285)"
   id="path3698"
   inkscape:connector-curvature="0" />

对应上以后，后台数据json的数值就可以对应上相应的SVG部位了，